Update pytest to 3.2.3

[pyup-bot]

There's a new version of pytest available.
You are currently using 3.2.2. I have updated it to 3.2.3

These links might come in handy: PyPI | Changelog | Repo | Homepage

Changelog

3.2.3

=========================

Bug Fixes

• Fix crash in tab completion when no prefix is given. (2748 <https://github.com/pytest-dev/pytest/issues/2748>_)

• The equality checking function (__eq__) of MarkDecorator returns
  False if one object is not an instance of MarkDecorator. (2758 <https://github.com/pytest-dev/pytest/issues/2758>_)

• When running pytest --fixtures-per-test: don't crash if an item has no
  fixtureinfo attribute (e.g. doctests) (2788 <https://github.com/pytest-dev/pytest/issues/2788>)

Improved Documentation

• In help text of -k option, add example of using not to not select
  certain tests whose names match the provided expression. (1442 <https://github.com/pytest-dev/pytest/issues/1442>_)

• Add note in parametrize.rst about calling metafunc.parametrize
  multiple times. (1548 <https://github.com/pytest-dev/pytest/issues/1548>_)

Trivial/Internal Changes

• Set xfail_strict=True in pytest's own test suite to catch expected
  failures as soon as they start to pass. (2722 <https://github.com/pytest-dev/pytest/issues/2722>_)

• Fix typo in example of passing a callable to markers (in example/markers.rst)
  (2765 <https://github.com/pytest-dev/pytest/issues/2765>_)

Got merge conflicts? Close this PR and delete the branch. I'll create a new PR for you.

Happy merging! 🤖

[neg3ntropy]

pending on upstream issue pytest-dev/pytest-bdd#224